Year SPI (scale 0-100) 2004 20 2005 20 2006 20 2007 20 2008 20 2009 20 2010 40 2011 40 2012 60 2013 50 2014 50 2015 70 2016 70 2017 80 2018 80 2019 80 2020 70 2021 80 2022 80